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MTBF Calculator

Formula

The formula to calculate the Mean Time Between Failures (MTBF) is:

$\text{MTBF} = \frac{\text{TOT}}{\text{TF}}$

Where:

$\text{MTBF}$ is the mean time between failures
$\text{TOT}$ is the total operational time (hours)
$\text{TF}$ is the total number of failures

What is MTBF?

MTBF, short for mean time between failures, is a metric that describes the average time it takes to incur a failure on a piece of equipment. The equipment can be manufacturing equipment that produces goods or something like air-conditioning. It is a crucial metric in reliability engineering and maintenance planning.

Example Calculations

Example 1:

Total Operational Time (TOT): 1000 hours
Total Number of Failures (TF): 5

Using the formula:

$\text{MTBF} = \frac{1000}{5} = 200 \text{ hours}$

Example 2:

Total Operational Time (TOT): 2000 hours
Total Number of Failures (TF): 10

Using the formula:

$\text{MTBF} = \frac{2000}{10} = 200 \text{ hours}$